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Figure 3: (a) sagittal, (b) axial preoperative MRI showing a large chordoma extensively involving the clivus, cavernous sinus, and sphenoid sinuses. The brainstem was pushed backward. (c and d) Postoperative MRI showing a radical resection from each involved compartment through a presigmoid approach

Figure 3: (a) sagittal, (b) axial preoperative MRI showing a large chordoma extensively involving the clivus, cavernous sinus, and sphenoid sinuses. The brainstem was pushed backward. (c and d) Postoperative MRI showing a radical resection from each involved compartment through a presigmoid approach